Grate for stoves



(No Model.) 2 Sheets-Sheet I.

G. M. COOPER.

GRATE FOR STOVES.

No. 341,733. Patented May 11, 18 86.

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(No Model.)

G. M. COOPER.

' GRATB FOB. STOVES.

Patented May 11, 1886.

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I GAGE M. COOPER, OF PORT HURON, MICHIGAN.

GRATE FOR STOVES.

fiPECIFICATIQN forming part of Letters Patent No. 341,733, dated May 11, 1886.

(No model.)

T0 at whom it may concern.-

Be it known that I, GAGE M. Ooornn. of Port Huron, in the county of St. Clair and State of Michigan, have invented a new and useful Improvement in Grates for Stoves, of which the following is a specification.

My invention consists in an improvement in grates for coal-stoves,liereinafter fully pointed out in the claims- Figure 1 is a plan view. Fig. 2 is a section on the line :0 m, Fig. 1. Fig. 3 is a side elevation. Fig. 4 is a bottom plan view with the stationary grate, except its center, and the shaking-lever removed. Fig. 5is a plan view of the shaking-lever.

G represents a ring which is usually put into stoves to support the grate.

F represents astationary grate of a common form of construction, having radial ribs F and concentric circles N connected thereto, made usually of cast-iron. The grate F rests on and is supported by ring G.

0 represents a sectional grate, which is made up of a number of parts-four, as shown in the drawingswhich are nearly sectors, and each of which consists of a number of concentric arcs, M, secured to a rib, E, at the center, which extends beyond the inner are, and to shorter ribs, I, at each end. The distances between the arcs M, I make substantially the same as that between the concentric circles N of the grate F, and make the width of both M and N substantially the same as the distance between them, so that when M are over the spaces between N said spaces will be closed. Ribs E, I put over ribs F.

Through theinner end of each rib F, which supports a rib, E, I cut a slot, (1., and through this slot a pin, 2', secured to the inner end of each rib E, projects. represents the inner ends of ribs F, which have no slot therein.

Over the center of the completed grate I put a cap to protect the shaking mechanism from ushers and clinkers, and this cap may be fiat, as shown at A, Fig. 2, or cone-shaped, as shown at A, Fig. 3.

II represents a shaking-lever, which has in it as many slots, h, as there are parts to the sectional grate O, and is fulcrumed at S on a pin, which passes through the center of the stationary grate F. The pins 6 on ribs E project into the slots it, and when lever H is rotated on its fulcrum the slots 72, being eccentric to the fulcrum, force the pins z to move toward or away from the circumference of the grate, and thus to move ribs E, and with them the sections of the grate 0, so that said sections move bodily away from or toward the center of the grate, and alternately cover and uncover the spaces between N.

I have shown the sectional grate made in four parts, and it is obvious that this number may be increased or decreased without departing from the principle of my invention. I also so place the two grates that when the sections of the'sectional grate are closed together they will rest with the arcs M over the spaces between the circles N, and thus make a grate which is well adapted to burning the fine grade of anthracite coal called pea, as the grate is tight enough to hold the coal, and shakes the tire thoroughly without exposing any large apertures. I also prefer to bevel the inner edge of each of the inner arcs, M, as shown at K, Fig. 3, to prevent the sections as they move toward the center from carrying ashes or clinkers into the shaking mechanism; but this need not be done, for the tendency of this grate is to carry all ashes toward the circumference.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with a stationary grate, of a grate resting thereon and formed in sections, each having substantially the form of a sect-or, and a shaker-lever having canrslots engaging with pins on said sections, and giving a radial movement thereto, substantially as described.

2. In combination with the supporting-ring G, the stationary grate F, having radial slots a, the seotionalgrate 0, having pins '5, and the shaking-lever H, having the cam-slots h, substantially as described.

3. The combination of a stationary radially slotted grate, a sectional grate movable on the stationary grate and having pins that enter the radial slots in said stationary grate, and a shaking lever having cam-slots engaging said pins, substantially as described.

4. The combination, with a stationary grate having radial guides, of a movable grate, consisting of sector-shaped sections engaging said guides, and a lever pivoted to the stationary grate and connected with the said sections, substantially as described.

Witnesses: GAGE M. COOPER.

E. G. SPALDING, N. Oitw'rnonnn. 

